Electrophilic cyclization of o-acetoxy and o-benzyloxy alkynylpyridines: an easy entry into 2,3-disubstituted furopyridines

Autor: Fabio Marinelli, Giancarlo Fabrizi, Sandro Cacchi, Antonio Arcadi, Di Giuseppe S
Jazyk: angličtina
Rok vydání: 2002
Předmět:
Popis: [reaction: see text] 2,3-Disubstituted furo[3,2-b]pyridines, 2,3-disubstituted furo[2,3-b]pyridines, and 2,3-disubstituted furo[2,3-c]pyridines are readily prepared under mild conditions via the palladium-catalyzed cross-coupling of 1-alkynes with o-iodoacetoxy- or o-iodobenzyloxypyridines, followed by electrophilic cyclization by I(2) or by PdCl(2) under a balloon of carbon monoxide.
Databáze: OpenAIRE